Multioffice interlocked signaling telephone system



y l959 J; G. PEARCE ETAL 2,897,283

' MULTIOFFICE INTERLOCKED SIGNALING. TELEPHONE SYSTEM Filed April 18,1958 r 54 Sheets-Sheet 1 LOCAL OFFICE LONG LONG Lone DISTANCE M DISTANCEU DISTANCE SWITCHING swncums v SWITCHING CENTER CENTER CENTER LOCALLOCAL I LOCAL OFFICE OFFICE -5 OFFICE V V A A v LOCAL LOCAL 7 OFFICEOFFICE INVENTORS. JAMES GORDON PEARCE BY MATTHEWRTUBINIS ATTORNEY Lu v 32 LINE {t TERMINATING 2 0 UNIT July 28, 1959 J. G. PEARCE ETAL 2,397,283

' MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18,1958' I I 54 Sheets-Sheet 2 F?.2fi 24 MULTIPLEX HIGHWAY I PULSE GEN.MONITOR Q a r:

D: & 2 3% LINE 9 TERMINATING C UNIT 20 3'; .95

SEIZE 8: RELEASE SCAN CIRCUIT ROUTE SELECTOR CALLING UNIT FINDER CIRCUITCONTROL COU NTER July 28, 1959 J. G. PEARCE ET AL 2,397,283

MULTIYIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18,1958 I 54 Sheets-Sheet 3 INVERTER AMPLIFIER HIGHWAY 2 MONITOR HYBRIDCCT.

LINK CCT-l INCOMING REGISTER INCOMING REGISTER ALLOTTER LINK KEY CCT.I

REGISTER SENDER cHAN'iu EL ALLOTTER 33 REGISTER FINDER July 28, 1959v.1. G. PEARCE ET AL MULTIOFFiCE INTERLOCKED SIGNALING TELEPHONE SYSTEMFiled April 18, 1958 54 Sheets-Sheet 4 N mOhDmEPQQ READOUT DISTRIBUTORSTORE CCT.

LINK CCT. 2s

LINK KEY CC125 ATTENDANT'S POSITION CCT.

y 1959 J. G. PEARCE ET AL 2,897,283

MULTIOFF'ICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Sheet 27.75. PULSE CHART TP4 U I TP5 I M TP? I U U TF8 I U UTP9 7 Ti V U TPIO U U 6RD. I-I [l TRIGGER- FIG. FIG. FIG. FIG. FIG. FIG.FIG. FIG. 2A 23 I3 l4 I5 l6 l7 FIG. FIG. FIG. FIG. FIG.

4 5 I8 9 20 FIG. FIG.

35 3s I. 2 1 FIG FIG. FIG. FIG. FIG FIG. 23 24 25 37 3a 39 FIG. FIG.

9 FIG. FIG. FIG. FIG. FIG. FIG. 26 27 28 46 47 4 FIG. FIG. FIG. FIG.FIG. FIG. FIG. FIG. FIG. 29 30 3| 32 33 49 50 5| 52 July 28, 1 5 J. G.PEARCE ETAL MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM FildApril 18, 1958 LINE TERMINATING UNIT- 54 Sheets-Sheet 6 RECEIVE GATESHIGHWAY NO.|

CA LLING RECEIVE CALLED HIGHWAY No.2

CALLING CALLED TO DISTANT OFFICE SIGNAL FREQUENCIES Z July 28, 1959 J.G. PEARCE ET AL 2,897,283

MULTIOFFICE INTERLOCKED SIGNALING- TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Sheet 7 I LINE TERMINATING UN'IT f 5' HIGHWAY No.2

' ssuo GATES HIGHWAY NOJ CALLING CALLED HIGHWAY NO.2

CALLING CALLED July 28, 1959 J, PEARCE T 2,897,283

MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYS TEM Filed April 18, 195854 Sheets-Sheet 8 L|NE TERMINATING UNIT 17- O -l, Q TOJ Flsm July 28,1959 J. G. PEARCE ET AL 2,897,283

MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Shet 9 HIGHWAY N O REE CT R II B- B- TIME POSITION l STOREJuly 28, 1959 J. G. PEARCE ET AL MULTIOF'FICE INTERLOCKED SIGNALINGfEL-EPHONE SYSTEM Filed April 18, 1958.

-54 Sheets-Sheet l0 HWI HWZ

n N U 6 m T A m M R E T w m a I u L E 94$ K r.+

M r 8 I p m m um a c r r|||l TO PULSE TPP GEN.

TPM I TIME POSITION IO TPBB FIG. 24

July 28, 1959 J. G. PEARCE ETAL 2,897,283

MULTIOFFICE INTERLOCKEID SIGNALING TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Sheet ll LINE TERMINATING UNIT Y DELAY l2 OUTGOING CALL 9H 79:7 SIB TO UM 2| I FIG.2O I

July 28, 1959 J, PEARCE T 2,897,283

MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18, 1958i 54 Sheets-Sheet 12 LINE TERMINATING UNIT $5.10

BUSY 2| FIG.20

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" |o|o TO F|G.l9 MYI fii F lOll LOCAL b RCA low |O|e :1 FIG-32 IOI9DEMAND CONTROL v zoxc TRIGGER July 28, 1959 J. G. PEARCE ETAL 2,897,283

MULTIOF F ICE INTERLOCKED SIGNALING TELEPHONE: SYSTEM Filed April 18,1958 54 Sheets-Sheet 13 T0 m4 SEIZE a RELEASE USIO USC IO we IO RRIO RIO

RAIO

July 28, 1959 MULTIOFFICE File d April 18, 1958 J. G. PEARCE ETALINTERLOCKED SIGNALING TELEPHONE SYSTEM 54 Sheets-Sheet 14 SEIZEa'RELEAsE SCAN CIRCUIT SE|ZE DETECTOR MF RECEIVER *IZIZ RELEASE aRELEASE ACKNOWLEDGE y 1959 J. G. PEARCE ET AL 2,897,283

MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Sheet 16 HIGHWAY l MONITOR CCT. 24

y 1959 J. G. PEARCE ET AL 2,897,283"

MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18, 195854 Sheets-Sheet l7 A TP TP IO CD. RIO

y 1959 J. G. PEARCE ET AL 2,897,283

MULTIQFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Fil ed April 18, 195854 Sheets-Sheet 18 FREQUENCIES 1 July 28, 1959 J. G. PEARCE ETgAL 72,897,283

I MULTIOFFICE INTERLOCKED SIGNALING TELEPHONE SYSTEM Filed April 18,1958 54 Sheets-Sheet 20 CONTROL COUNTER |5 TRIGGER

